/*
 * Copyright 2017 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.kie.workbench.common.dmn.client.commands.expressions.types.function;

import org.kie.workbench.common.dmn.api.definition.model.FunctionDefinition;
import org.kie.workbench.common.dmn.api.definition.model.InformationItem;
import org.kie.workbench.common.dmn.client.commands.VetoExecutionCommand;
import org.kie.workbench.common.dmn.client.commands.VetoUndoCommand;
import org.kie.workbench.common.dmn.client.editors.expressions.types.function.FunctionDefaultValueUtilities;
import org.kie.workbench.common.stunner.core.client.canvas.AbstractCanvasHandler;
import org.kie.workbench.common.stunner.core.client.canvas.command.AbstractCanvasCommand;
import org.kie.workbench.common.stunner.core.client.canvas.command.AbstractCanvasGraphCommand;
import org.kie.workbench.common.stunner.core.client.command.CanvasCommandResultBuilder;
import org.kie.workbench.common.stunner.core.client.command.CanvasViolation;
import org.kie.workbench.common.stunner.core.command.Command;
import org.kie.workbench.common.stunner.core.command.CommandResult;
import org.kie.workbench.common.stunner.core.graph.command.GraphCommandExecutionContext;
import org.kie.workbench.common.stunner.core.graph.command.GraphCommandResultBuilder;
import org.kie.workbench.common.stunner.core.graph.command.impl.AbstractGraphCommand;
import org.kie.workbench.common.stunner.core.rule.RuleViolation;

public class AddParameterCommand extends AbstractCanvasGraphCommand implements VetoExecutionCommand,
                                                                               VetoUndoCommand {

    private final FunctionDefinition function;
    private final InformationItem parameter;
    private final org.uberfire.mvp.Command canvasOperation;
    private final String name;

    public AddParameterCommand(final FunctionDefinition function,
                               final InformationItem parameter,
                               final org.uberfire.mvp.Command canvasOperation) {
        this.function = function;
        this.parameter = parameter;
        this.canvasOperation = canvasOperation;
        this.name = FunctionDefaultValueUtilities.getNewParameterName(function);
    }

    @Override
    protected Command<GraphCommandExecutionContext, RuleViolation> newGraphCommand(final AbstractCanvasHandler handler) {
        return new AbstractGraphCommand() {
            @Override
            protected CommandResult<RuleViolation> check(final GraphCommandExecutionContext gce) {
                return GraphCommandResultBuilder.SUCCESS;
            }

            @Override
            public CommandResult<RuleViolation> execute(final GraphCommandExecutionContext gce) {
                function.getFormalParameter().add(parameter);
                parameter.getName().setValue(name);

                parameter.setParent(function);

                return GraphCommandResultBuilder.SUCCESS;
            }

            @Override
            public CommandResult<RuleViolation> undo(final GraphCommandExecutionContext gce) {
                function.getFormalParameter().remove(parameter);

                return GraphCommandResultBuilder.SUCCESS;
            }
        };
    }

    @Override
    protected Command<AbstractCanvasHandler, CanvasViolation> newCanvasCommand(final AbstractCanvasHandler handler) {
        return new AbstractCanvasCommand() {
            @Override
            public CommandResult<CanvasViolation> execute(final AbstractCanvasHandler handler) {
                canvasOperation.execute();

                return CanvasCommandResultBuilder.SUCCESS;
            }

            @Override
            public CommandResult<CanvasViolation> undo(final AbstractCanvasHandler handler) {
                canvasOperation.execute();

                return CanvasCommandResultBuilder.SUCCESS;
            }
        };
    }
}
